Pen



FIG. 1 is an upper front right perspective view of a pen showing my newdesign, with a flexible clip attached to the body of the pen;

FIG. 2 is an upper front left perspective view thereof, with theflexible clip alternately attached to a push button of the pen;

FIG. 3 is a front elevation view of the pen shown in FIG. 1;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side elevation view thereof, with the left sideelevation view being a mirror image of the right side elevation view;

FIG. 6 is an enlarged top plan view thereof; and,

FIG. 7 is an enlarged bottom plan view thereof.

The stippling shown in FIGS. 1-7 represents a surface texture.

The ornamental design for a pen, as shown and described.